'Bulletproof' is either a first or second generation sport from 'Halcyon', depending on which source you use. Mine is a direct sport from 'Touch of Class' in my own garden. I was told, on the Hallson forum when I posted pictures of it, that Q & Z Nursery (now closed) called the solid blue sport from 'Touch of Class' 'Bulletproof' and marketed it as such. So I've decided to call it 'Bulletproof' too whether it's entirely correct or not. It sported and was separated in 2010. it's a medium sized, blue plant, likely a tetraploid. As with most of this family, it holds up very well all season long.